If you want a real Jackson neck you should probably look on ebay. They come up every so often. If you just need a replacement neck Warmoth could probably hook you up with something that will work. You could try Jackson too but you probably won't have any luck with them, but I could be wrong. Expect to pay a few hundred bucks regardless.
thanks. Nothing from Jackson, Warmoth doesn't have the right one, so I picked up one on ebay. I wish there was a way to get one straight from Jackson, though. Again, thanks.